Stocks that are making large moves like these are favorites among short-term traders because they can jump into these names and try to capture some of that massive volatility. Stocks that are making big-percentage moves either up or down are usually in play because their sector is becoming attractive or they have a major fundamental catalyst such as a recent earnings release. Sometimes stocks making big moves have been hit with an analyst upgrade or an analyst upgrade.

Regardless of the reason behind it, when a stock makes a large-percentage move, it is often just the start of a new major trend -- a trend that can lead to huge profits. If you time your trade correctly, combining technical indicators with fundamental trends, discipline and sound money management, you will be well on your way to investment success.

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Arena Pharmaceuticals ( ARNA) is a clinical-stage biopharmaceutical company focused on discovering, developing and commercializing oral drugs that target G protein-coupled receptors, in four therapeutic areas: cardiovascular, central nervous system, inflammatory and metabolic diseases. This stock is trading up 8.7% to $7.69 in recent trading.

Today's Range: $7.20-$7.75

52-Week Range: $1.23-$7.23

Volume: 26.1 million

Three-Month Average Volume: 15.4 million

From a technical perspective, ARNA is ripping higher here on monster volume. This move is a continuation pattern from yesterday when the stock broke out above some past overhead resistance at $7.01 with high volume.

Traders should continue to look for long-biased trades as long as ARNA is trending above $7.01, and once it triggers its next big breakout. The next major breakout will trigger for ARNA once it takes out $8 with high-volume. Look for a sustained move or close over $8 with volume that's near or above 15.4 million shares. If we get that action soon, then ARNA could easily continue its uptrend towards $10 in the near future.

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Theragenics ( TGX) is a medical device company, manufactures, markets, and sells disposable devices and radioactive seeds to the surgical products and cancer treatment markets. This stock is trading up 17.6% to $2.07 in recent trading.

Today's Range: $2.02-$2.10

52-Week Range: $1.18-$1.94

Volume: 580,000

Three-Month Average Volume: 35,697

Shares of TGX are soaring today after the company said it plans to repurchase up to $10 million worth of its shares in a modified Dutch auction tender offer. Under the terms of the tender offer, Theragenics stockholders will have the opportunity to tender some or all of their shares at a price within a range of $2 to $2.40 per share.

From a technical perspective, TGX is gapping up big here with monster volume. This move has pushed the stock into breakout territory, since shares have moved above some near-term overhead resistance at $1.94.

Traders should continue to look for long-biased trades as long as the stock is trending above $1.94, and once it triggers its next major breakout. That major breakout will hit once TGX takes out some past overhead resistance at $2.29 with high volume. Look for a sustained move or close above $2.29 with volume that's near or above 35,697 shares. If we get that action soon, then TGX could hit $3 in the near future. On the flipside, I would avoid any long grades if TGX trades back below $1.94 with high-volume.

Emulex

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Emulex ( ELX) is a provider of a range of network convergence solutions that connect servers, storage, and networks within the data center. This stock is trading up 6.5% at $7.42 in recent trading.

From a technical perspective, ELX is soaring higher here on above average volume. This move is coming off of a near-term low of $6.38, which also marked an extreme oversold condition for the stock. Prior to this bounce off of $6.38, shares of ELX had a relative strength index reading of below 30.

Traders should now look for long-biased trades if ELX can hold its near-term breakout above $7.29. Look for a sustained trend above $7.29 with strong upside volume flows that register near or above 1.1 million shares. If we continue to see that action, then ELX should easily re-test and possibly take out its 50-day moving average at $8.20 and its 200-day moving average of $8.31 in the near future.

THT Heat Transfer Technology

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THT Heat Transfer Technology ( THTI), through its subsidiaries, is a provider of heat exchange products. THT Heat Transfer is engaged in the manufacturing and trading of plate heat exchangers and various related products. This stock is trading up 6.3% at $2.19 in recent trading.

From a technical perspective, THTI is moving modestly higher here on below average volume. This move has briefly pushed the stock into breakout territory above some near-term overhead resistance at $2.18. At last check, THTI has hit an intraday high of $2.25 on light volume, and subsequently pulled back to around $2.13.

Traders should now look for long-biased trades once THTI triggers its next big breakout above $2.25 with high-volume. Look for a sustained move or close above $2.25 with volume that's near or above 148,081 shares. If we get that action soon, THTI should re-test its next significant overhead resistance at $2.75 and possibly $3.68.

Nevsun Resources

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Nevsun Resources ( NSU) is a gold and base metal mining and exploration company. Nevsun Resources, through its subsidiaries, is engaged in the acquisition, exploration, development and production of mineral properties. This stock is trading up 8% at $3.89 in recent trading.

From a technical perspective, NSU is bouncing hard here off some previous support at $3.57 with light volume. This move is quickly pushing NSU within range of a near-term breakout trade. That trade will hit once NSU takes out some near-term overhead resistance at $4.05 with high volume.

Traders should now look for long-biased trades if NSU can sustain a move or close above $4.05 with volume that's near or above 648,291 shares. If we get that action soon, then NSU has a great chance of re-testing and possibly taking out its 200-day moving average of $4.85.

Unilife

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Unilife ( UNIS) is a developer and supplier of a portfolio of drug delivery systems. The company focuses on the design, development, manufacture and supply of a range of retractable syringes. This stock is trading up 4.2% to $4.67 in recent trading.

Today's Range: $4.39-$4.75

52-Week Range: $2.82-$5.44

Volume: 150,000

Three-Month Average Volume: 265,998

From a technical perspective, UNIS is moving notably higher here on light volume. This moving is coming after a powerful bounce on last Friday that was sparked right off its 50-day moving average of $4.10 with monster volume.

Traders should now look for long-biased trades if UNIS can mange trigger a near-term breakout with high-volume. That breakout will hit once UNIS takes out yesterday's high of $5.17 with volume that's near or above 265,998 shares. If we get that action soon, then UNIS has a great chance of hitting its next significant overhead resistance levels at $5.44 to $6 in the near future. moving averageOn the flipside, I would avoid this stock for any long trades in the near-term if it takes out today's low of $4.38 with volume.

McEwen Mining

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McEwen Mining ( MUX) is engaged in the exploration for and production of precious metals in the United States, Mexico and Argentina. This stock is trading up 6.8% to $2.63 in recent trading.

Today's Range: $2.47-$2.65

52-Week Range: $1.96-$7.18

Volume: 1.45 million

Three-Month Average Volume: 2.7 million

From a technical perspective, MUX is ripping higher here on light volume. This move is coming off of some previous support at around $2.42.

Traders should now look for long-biased trades in MUX if it can manage to trigger a near-term breakout with high-volume. That breakout will hit once MUX takes out some near-term overhead resistance at $2.82, and then its 50-day moving average of $3.14. Look for a sustained move or close above those levels with volume that's near or above 2,731,070 shares. If we get that action soon, then MUX could trade up towards its next significant overhead resistance level at $4.05, or possibly its 20-day moving average at $4.24.

At the time of publication, author had no positions in stocks mentioned.

Roberto Pedone, based out of Windermere, Fla., is an independent trader who focuses on stocks, options, futures, commodities and currencies. He is also an outside contributor to Beconequity.com and maintains the website Maddmoney.net, which he sold to Blue Wave Advisors in 2008. Roberto studied International Business at The Milwaukee School of Engineering, and he spent a year overseas studying business in Lubeck, Germany.